@article { ISI:000367614000033,
	title = {Even the normal is abnormal: N-heterocyclic carbene C-2 binding to a phosphaalkene without breaking the P=C pi-bond},
	journal = {Chem.Commun.},
	volume = {52},
	number = {5},
	year = {2016},
	pages = {998-1001},
	abstract = {<p>The reaction of MesP=CPh2 with the least sterically demanding N-heterocyclic carbene (NHC = IMe) results in formation of the {\textquoteleft}abnormal\&$\#$39; (C-4-substituted) 4-phosphino-NHC (1). In contrast, reaction with Me2IMe gives the unprecedented {\textquoteleft}normal\&$\#$39; C-2 adduct, Me2IMe -\&gt; P(Mes)=CPh2 (2). Particularly striking is the asymmetric and weak bonding of the NHC to the P=C moiety in 2. DFT calculations indicate that the P=C natural bond order in 2 (1.54) still reflects significant pi-character to the bond (cf. MesP=CPh2: NBO = 1.98). Further computational analysis suggests that pi-delocalization into the remote C-phenyl substituents is key to stabilizing the NHC adduct.</p>},
	issn = {1359-7345},
	doi = {10.1039/c5cc08181e},
	author = {Majhi, Paresh Kumar and Chow, Keith C. F. and Hsieh, Tom H. H. and Bowes, Eric G. and Schnakenburg, Gregor and Kennepohl, Pierre and Streubel, Rainer and Gates, Derek P.}
}
